JP2008230403A - Seat belt retractor and its mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt retractor having a comparatively simple structure capable of preventing the occurrence of noise from a cover member accompanying vibration of a pendulum. <P>SOLUTION: In the seat belt retractor equipped with a response operation means loaded in a vehicle for operating in response to generation of speed reduction of the vehicle, the pendulum of the response operation means that changes its attitude in response to the generation of speed reduction is provided in the proximity of the resin cover member that forms at least one portion of a housing of a retractor body. A vibration control member for suppressing vibration of the cover member is provided on at least a position corresponding to the pendulum on a surface of the cover member or in the proximity thereof. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seat belt retractor equipped with response operation means mounted on a vehicle and operating in response to the occurrence of deceleration of the vehicle, and an attachment structure thereof.

  Conventionally, various attempts have been made to suppress the vibration of the seat belt retractor main body or its internal configuration, or the generation of abnormal noise associated with the vibration. For example, in Patent Document 1 below, a metal inertia pendulum that is supported in an enclosed state in a synthetic resin box and that swings upon sensing a deceleration, is in contact with the upper part of the inertia pendulum, and one end of the metal pendulum swings. It consists of a lock lever that is pivotally supported and a cam wheel that faces the other end of the lock lever and that is linked to the belt take-up shaft, and the inertia pendulum swings in response to the occurrence of a predetermined deceleration. The retractor for the seat belt is configured to prevent the shaft from rotating by engaging the lock teeth formed on the outer periphery of the cam wheel. In the emergency lock device, a buffer member is interposed at a contact portion between the inertia pendulum, the lock lever, and the box.

  Further, for example, in Patent Document 2 below, a retractor body is used as a retractor that prevents the retractor body from being shaken by vibrations generated in the vehicle body when the vehicle is running or when the door is opened and closed, and prevents the generation of unpleasant sound. An upper stay and a lower stay for attaching a retractor body to a vehicle body, and a support member for supporting the retractor body on the body are interposed between the retractor body and the body.

Japanese Utility Model Publication No. 01-174267 JP 2000-177536 A

  By the way, in the seat belt retractor provided with a pendulum that is provided so as to be close to a cover member that forms at least a part of the housing of the retractor body and changes its posture in response to the occurrence of deceleration, it is taken up in each of the above patent documents. As a phenomenon other than the occurrence of vibration of the seat belt retractor main body or the internal structure thereof, or the generation of abnormal noise accompanying the vibration, the inventor of the present application has a pendulum particularly when traveling on a road surface where unevenness continues continuously. It has been found that a phenomenon occurs in which a relatively large noise is generated when the vibration vibrates so as to change its posture and the vibration is transmitted to the cover member. For example, a seat belt retractor for a rear seat is generally disposed near the ears of an occupant seated on the rear seat, and such abnormal noise can be unpleasant. Of course, it is desirable that the means for suppressing the occurrence of such abnormal noise be realized with a simple structure.

  The present invention has been made in view of the above technical problem, and provides a seat belt retractor having a relatively simple structure capable of preventing the generation of noise from a cover member due to vibration of a pendulum, and an attachment structure thereof. With the goal.

  Accordingly, the invention according to claim 1 of the present application is a seat belt retractor provided with a response operation means that is mounted on a vehicle and operates in response to the occurrence of deceleration of the vehicle. A pendulum whose posture changes in response to the pendulum, and the pendulum is provided so as to be close to a resin cover member that forms at least a part of the housing of the retractor body. A vibration damping member that suppresses vibration of the cover member is provided at a corresponding portion or in the vicinity thereof.

  The invention according to claim 2 of the present application is the retractor according to claim 1, wherein the response operation means is configured so that the pendulum takes a vertical posture with respect to the cover member in a non-decelerating state. It is characterized in that it can be mounted in a variable posture corresponding to the installation posture.

  Furthermore, the invention according to claim 3 of the present application is the invention according to claim 1, wherein the cover member includes a vertical surface that extends substantially vertically in the installed state of the retractor on the surface side on which the damping member is provided. On the other hand, on the back side facing the retractor body, it is formed to have a substantially circular rising wall portion that rises substantially perpendicular to the vertical surface, and the response operation means is The posture is variable by being supported along the rising wall portion.

  Furthermore, the invention according to claim 4 of the present application is a seat belt retractor mounting structure equipped with response operation means mounted on a vehicle and operating in response to the occurrence of deceleration of the vehicle. A pendulum whose posture changes in response to the occurrence of deceleration, the pendulum is provided so as to be close to a resin cover member that forms at least a part of the housing of the retractor body, and the surface of the cover member A vibration damping member that suppresses vibration of the cover member is provided at least in a region corresponding to the pendulum or in the vicinity thereof, and the retractor is installed on the inner side in the vehicle width direction from the outer structure of the vehicle body and the outer structure of the vehicle body. The damping member provided on the surface of the cover member is installed so as to face the trim member, and the damping member is Is provided to be in contact with the arm member, that is obtained by it said.

  Furthermore, the invention according to claim 5 of the present application is the invention according to claim 4, wherein the retractor includes a seat belt with a drawer portion located on the upper surface of the main body of the retractor, and the seat belt withdrawing direction. The pendulum of the response operation means is attached to the front portion of the cover member in the vehicle front-rear direction and is tilted inward in the vehicle width direction with respect to the vehicle front-rear direction. Is provided so as to be sandwiched between the front portion of the cover member and the trim member.

  Further, the invention according to claim 6 of the present application is the invention according to claim 4 or 5, wherein the trim member is directed from the outer structure of the vehicle body to the inner side in the vehicle width direction around the portion where the damping member contacts. And a hole for extending a striker connected to a seat back that can be tilted forward is provided in the vehicle interior.

  According to the invention of claim 1 of the present application, since the damping member that suppresses the vibration of the cover member is provided at least in a portion corresponding to the pendulum on the surface of the cover member or in the vicinity thereof, the structure is relatively simple. When the vehicle is traveling, the vibration of the cover member accompanying the vibration of the pendulum can be suppressed, and the generation of relatively large noise can be suppressed.

  According to the second aspect of the present invention, the response operation means is attached to the cover member so that the pendulum takes a vertical posture in a non-decelerating state regardless of the installation posture of the seat belt retractor. Therefore, it is possible to suppress the vibration of the cover member accompanying the vibration of the pendulum and suppress the generation of abnormal noise while ensuring the flexibility of installing the retractor.

  Furthermore, according to the invention of claim 3 of the present application, in the cover member, the structure of supporting the response operation means in a variable posture is relatively simple, and the vibration of the cover member due to the vibration of the pendulum is suppressed. The occurrence of abnormal noise can be suppressed.

  Furthermore, according to the invention according to claim 4 of the present application, since the damping member that suppresses the vibration of the cover member is provided at least in a portion corresponding to the pendulum on the surface of the cover member or in the vicinity thereof, With a simple structure, it is possible to suppress the vibration of the cover member due to the vibration of the pendulum when the vehicle travels, and to suppress the generation of a relatively large noise. In addition, since the vibration damping member is merely interposed between the cover member and the trim member, it is possible to suppress an increase in the separation distance between the retractor and the trim, and avoid a reduction in the vehicle interior space. be able to.

  Further, according to the invention according to claim 5 of the present application, it is possible to provide a vibration damping member also in a portion where the distance between the cover member and the trim member is narrow, and the cover member and the trim member are connected to the vibration damping member. Thus, the vibration of the cover member accompanying the vibration of the pendulum can be suppressed, and the generation of abnormal noise can be suppressed.

  Furthermore, according to the invention of claim 6 of the present application, the trim member is supported via the damping member, so that the vibration of the trim member near the hole for the striker formed in the trim member can be reduced. The deformation can be suppressed, and the appearance can be improved by reducing the hole.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a plan view schematically showing a seat belt retractor mounting structure according to an embodiment of the present invention. The left side in the figure corresponds to the front of the vehicle, and the lower side in the figure corresponds to the inside in the vehicle width direction. 2 and 3 are views taken along arrows XX and YY in FIG. 1, respectively.

  The seat belt retractor 10 (hereinafter simply referred to as “retractor”) is provided in the vicinity of the rear pillar for an occupant seated on the rear seat. As can be seen from FIG. 1, the outer structure of the vehicle body adjacent to the rear door panel 36 is provided. Installed between the panel body 30 (consisting of the inner panel 32 and the outer panel 34) and the trim 20 which is installed on the inner side in the vehicle width direction from the panel body 30 and forms a part of the vehicle interior wall with the inner side surface 20a. ing. And the retractor 10 is fixed to the inner panel 32 through the bracket 12 with the extension portion 6a extending from the metal cover member 6 defining the upper surface portion of the main body housing to the rear of the vehicle. It is supported.

  As can be seen from FIG. 1, the metal cover member 6 is provided with a drawer portion 8 of the seat belt 1, and the retractor 10 is arranged so that the drawer portion 8 is located on the upper surface side of the main body. In addition, the retractor 10 is disposed such that the direction in which the seat belt 1 is drawn is directed forward while inclining inward in the vehicle width direction with respect to the vehicle front-rear direction.

  Further, the retractor 10 includes a resin cover member 2 that defines a part of the side surface portion of the main body housing, and the cover member 2 is disposed so as to face the outer surface 20 b of the trim 20. The cover member 2 basically accommodates an emergency lock mechanism including a deceleration sensor 3 and a geared clutch wheel 4 (both see FIG. 4) that operate in response to the occurrence of deceleration of the vehicle.

  Further, as shown in FIG. 1, the outer surface 20 b of the trim 20 is provided with a pedestal 23 with a clip 24 on the tip side, and the trim 20 is held with respect to the retractor 10 via the damping member 11. In addition, the clip 24 is supported by being inserted into the receiving portion on the inner panel 32 side.

  In addition, as can be seen from FIG. 1, in the present embodiment, the striker 22 is supported by the pedestal 21 installed on the inner surface of the inner panel 32, and is directed from the inner panel 32 toward the inner side in the vehicle width direction. It is extended. The striker 22 protrudes into the vehicle compartment through an insertion hole 20c formed in the trim 20, and is gripped by a latch 19 provided on the seat back 18 side of the rear seat that can be tilted forward, so that the seat back 18 is in an upright state. Will be held.

  Next, the attachment structure of the deceleration sensor 3 in the cover member 2 of the retractor 10 will be described. FIG. 4 is a front view of the retractor 10. In this figure, the cover member 2 is partially cut away, and the installation posture of the deceleration sensor 3 (corresponding to “reaction operation means” in claims) is shown. It is shown.

  The deceleration sensor 3 basically includes a pendulum 3a that swings and changes its posture in response to the occurrence of vehicle deceleration, and a follower member 3b that follows the swing of the pendulum 3a with a predetermined swing width or more. ,have. The driven member 3b has a meshing claw 3c that is supported in the vicinity of a gear portion (not shown) of the clutch wheel 4 housed in the cover member 2 together with the deceleration sensor 3 in a non-decelerating state. When the pendulum 3a swings with a swing width greater than or equal to a predetermined amount in response to the occurrence of deceleration, the driven member 3b is driven. It will be prevented from being pulled out.

  The deceleration sensor 3 is supported by the cover member 2 such that the pendulum 3a takes a vertical posture in a non-decelerated state in accordance with the installation posture of the retractor 10 in a variable posture. Specifically, the cover member 2 forms a vertical surface 2a that spreads substantially vertically in the installed state of the retractor 10 on the side facing the trim 20, and on the back surface side facing the retractor body with respect to the vertical surface 2a. Thus, it is formed to have a circular peripheral edge 2b as a substantially circular rising wall that rises substantially vertically. The deceleration sensor 3 is attached to the cover member 2 so as to be held between the circumferential edge 2b and the clutch wheel 4 and changes its position between the circumferential edge 2b and the clutch wheel 4. The posture is variable. Accordingly, as long as the retractor 10 is installed so as to form the vertical surface 2a on the side where the cover member 2 faces the trim 20, the posture of the deceleration sensor 3 is set so that the pendulum 3a takes a vertical posture in a non-decelerated state. Can be changed. In the present embodiment, the pendulum 3a of the deceleration sensor 3 is attached to the front side (the left side in FIG. 4) of the cover member 2 in the vehicle front-rear direction.

  By the way, as described above, the inventor of the present application detects vibration of the pendulum 3a in the retractor 10 in which the pendulum 3a of the deceleration sensor 3 whose posture changes according to the occurrence of deceleration is provided close to the cover member 2. Along with this, it has been found that a phenomenon in which the cover member 2 vibrates and abnormal noise occurs can occur. In order to suppress the occurrence of such abnormal noise, in this embodiment, a vibration damping member 11 having flexibility is attached to the vertical surface 2 a of the cover member 2 of the retractor 10. Further, the damping member 11 has a predetermined thickness so as to be in contact with the outer side surface 20 b of the trim 20 on the side facing the trim 20. That is, the damping member 11 is provided so as to be sandwiched between the cover member 2 and the trim 20.

  In the present embodiment, an annular butyl rubber member corresponding to the shape of the cover member 2 is used as the damping member 11, and the damping member 11 is bonded to the cover member 2 of the retractor 10 with an adhesive.

  In this way, by providing the flexible damping member 11 between the cover member 2 and the trim 20, the cover member 2 and the trim 20 are stably supported via the damping member 11. Thus, with a relatively simple structure, the vibration of the cover member 2 accompanying the vibration of the pendulum 3a can be suppressed, and the generation of abnormal noise can be suppressed. In addition, since the vibration damping member 11 is merely interposed between the cover member 2 and the trim 20, it is possible to suppress an increase in the separation distance between the retractor 10 and the trim 20, and to reduce the vehicle interior space. Can be avoided.

  In the present embodiment, as shown in FIG. 5 as a perspective view of the damping member 11, the damping member 11 has an annular shape corresponding to the shape of the cover member 2. However, the present invention is not limited to this. If it is provided so as to form a shape corresponding to at least a portion corresponding to the pendulum 3a on the surface of the cover member 2 or the vicinity thereof, the same effect as when the annular cover member 2 is employed can be obtained. .

  Further, in the present embodiment, as shown in FIG. 1, the damping member 11 is provided in the vicinity of the insertion hole 20 c through which the striker 22 is inserted, and the trim 20 is supported via the damping member 11. As a means for attaching the trim 20 to the inner panel 32, the pedestal 25 with a clip around the insertion hole 20c (shown in phantom lines in FIG. 1) can be omitted. Thereby, it is not necessary to increase the trim thickness to install a pedestal around the insertion hole 20c, and as a result, the occurrence of shrinkage in the trim 20 can be suppressed.

  Further, the trim 20 around the striker 22 is easily deformed by the forward tilting operation of the seat back 18, and the insertion hole 20c tends to be large in order to prevent interference between the striker 22 and the insertion hole 20c. By being supported via the vibration member 11, vibration and deformation of the trim 20 around the insertion hole 20c can be suppressed, and the appearance can be improved by reducing the insertion hole 20c.

  In addition, in the present embodiment, as described above, the deceleration sensor 3 is located with respect to the cover member 2 so that the pendulum 3a takes a vertical posture in a non-decelerating state regardless of the installation posture of the retractor 10. Since it is attached, while ensuring the flexibility of installation of the retractor 10, the vibration of the cover member 2 accompanying the vibration of the pendulum 3a can be suppressed, and the generation of abnormal noise can be suppressed. In addition, in the cover member 2, the deceleration sensor 3 is attached along the circular peripheral edge 2b formed on the side facing the retractor body, so that the structure for supporting the deceleration sensor 3 in a variable posture is relatively simple. Can be configured. Although the support structure of the deceleration sensor 3 is not optimal for suppressing the generation of abnormal noise due to the vibration of the cover member 2, the noise suppressing member 11 as described above is provided, so that Can be effectively suppressed.

  In particular, since the rear seat retractor 10 is generally disposed near the ears of the seated occupant, as described above, the generation of abnormal noise from the cover member 2 of the retractor 10 is suppressed. Is more effective in improving the ride comfort of the occupant.

  In addition, in the present embodiment, as described above, the retractor 10 is installed so that the pull-out direction of the seat belt 1 is directed forward while tilting inward in the vehicle width direction with respect to the vehicle longitudinal direction. The distance between the cover member 2 and the trim 20 becomes narrower toward the front in the vehicle front-rear direction. However, the damping member 11 can be provided in such a narrow portion, and the cover member 2 and the trim 20 can be provided. Can be supported with each other via the damping member 11.

It should be noted that the present invention is not limited to the illustrated embodiments, and it goes without saying that various improvements and design changes can be made without departing from the scope of the present invention.
For example, in the embodiment described above, the seat belt retractor 10 for the rear seat has been particularly taken up. However, the present invention is not limited to this, and the present invention can also be applied to a seat belt retractor for the front seat.

It is a top view which shows roughly the attachment structure of the seatbelt retractor which concerns on embodiment of this invention. It is an arrow view along the XX line in FIG. It is an arrow view along the YY line in FIG. It is a front view which partially cuts and shows the said seatbelt retractor. It is a perspective view of the damping member attached to the said seatbelt retractor.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Seat belt, 2 ... Cover member, 2a ... Vertical surface, 2b ... Circular peripheral part, 3 ... Deceleration sensor, 3a ... Pendulum, 3b ... Follow-up member, 8 ... Drawer part, 10 ... Seat belt retractor, 11 ... Control Shaking member, 18 ... seat back, 19 ... latch, 20 ... trim, 20c ... insertion hole, 22 ... striker, 23 ... pedestal, 24 ... clip, 30 ... panel body, 32 ... inner panel, 34 ... outer panel.

Claims (6)

In a seat belt retractor equipped with response operation means mounted on a vehicle and operating in response to the occurrence of deceleration of the vehicle,
The response operation means has a pendulum whose posture changes in response to the occurrence of deceleration, and the pendulum is provided so as to be close to a resin cover member that forms at least a part of the housing of the retractor body. And
A seat belt retractor, wherein a damping member that suppresses vibration of the cover member is provided at least in a portion corresponding to a pendulum on the surface of the cover member or in the vicinity thereof.   The response operation means is attached to the cover member in a variable posture corresponding to the installation posture of the retractor so that the pendulum takes a vertical posture in a non-decelerated state. The seat belt retractor according to 1. The cover member includes a vertical surface that extends substantially vertically in the installed state of the retractor on the surface side where the damping member is provided, and is substantially perpendicular to the vertical surface on the back surface side that faces the retractor body. It is formed to have a substantially circular rising wall that rises,
The seat belt retractor according to claim 2, wherein the response operation means is variable in posture by being supported along the rising wall portion with respect to the cover member. In a seat belt retractor mounting structure equipped with response operation means mounted on a vehicle and operating in response to the occurrence of deceleration of the vehicle,
The response operation means has a pendulum whose posture changes in response to the occurrence of deceleration, and the pendulum is provided so as to be close to a resin cover member that forms at least a part of the housing of the retractor body. ,
A vibration damping member that suppresses vibration of the cover member is provided at least in a portion corresponding to the pendulum on the surface of the cover member or in the vicinity thereof,
The damping member provided on the surface of the cover member faces the trim member between the outer structure of the vehicle body and the trim member installed on the inner side in the vehicle width direction from the outer structure of the vehicle body. A seatbelt retractor mounting structure, wherein the seatbelt retractor mounting structure is provided so that the vibration damping member is in contact with the trim member. The retractor is installed so that the seat belt drawer is positioned on the upper surface of the main body of the retractor, and the seat belt withdrawing direction is inclined forward inward in the vehicle width direction with respect to the vehicle longitudinal direction. And
The pendulum of the response operation means is attached to the front portion of the cover member in the vehicle longitudinal direction,
5. The seat belt retractor mounting structure according to claim 4, wherein the vibration damping member is provided so as to be sandwiched between a front portion of the cover member and the trim member.   A striker that extends from the outer structure of the vehicle body toward the inner side in the vehicle width direction and extends in the vehicle interior around the portion of the trim member that comes into contact with the damping member. 6. The seat belt retractor mounting structure according to claim 4, wherein a hole is formed.

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